#42B4DA#42B4DA

#42B4DA is a light, moderate cyan. Relative luminance 0.389; OKLCH L 72.2% C 0.114 H 224.1°. Best body text is #000000 at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#42B4DA
RGB	rgb(66, 180, 218)
HSL	hsl(195, 67%, 56%)
HSV	hsv(195, 70%, 85%)
CMYK	cmyk(69.7%, 17.4%, 0%, 14.5%)
CIE-LAB	lab(68.65, -19.89, -28.43)
CIE-LCH	lch(68.65, 34.70, 235.03°)
OKLab	oklab(72.16% -0.082 -0.0795)
OKLCH	oklch(72.16% 0.114 224.1)
XYZ	xyz(31.2177, 38.8592, 72.1714)
Luminance	0.3886 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4DA #DA6842

analogous

#42DAB4 #42B4DA #4268DA

triadic

#42B4DA #DA42B4 #B4DA42

tetradic

#42B4DA #B442DA #DA6842 #68DA42

square

#42B4DA #B442DA #DA6842 #68DA42

split-complementary

#42B4DA #DA4268 #DAB442

monochromatic

#1A6C87 #2495BA #42B4DA #75C8E4 #A8DDEE

Accessibility & contrast

On white

2.39

#42B4DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.77

#42B4DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4DA

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4DA	#FFFFFF	#000000	##000000
##42B4DA	1.00	2.39	8.77	8.77
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.77	21.00	1.00	1.00
##000000	8.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB0DC

Deuteranopia (green-blind)

#8AA1DA

Tritanopia (blue-blind)

#00BFC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b4da;
/* rgb */ color: rgb(66, 180, 218);
/* oklch */ color: oklch(72.2% 0.114 224.1);

Tailwind

colors: {
  custom: {
    50: '#89cae5',
    500: '#42b4da',
    950: '#000000',
  },
}

SCSS

$custom: #42b4da;
$custom-light: #89cae5;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4da",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 218
  },
  "hsl": {
    "h": 195,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.72155,
    "c": 0.11422,
    "h": 224.1
  },
  "luminance": 0.38863
}

Semantic roles & 50–950 ramp

primary

#42B4DA

secondary

#DBAC9C

accent

#693EEA

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1315

muted

#7E8284

Preview Lab

Preview with #42B4DA

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →